Well, my trusty Kenwood TS-520SE decided to start giving me problems.
Essentially, receive is fine but when transmitting CW, the power output is
~ 13W. When tuning up the transmitter, the grid bias will not go below
70mA to the specified 60mA. It will only go 70mA and up when adjusting the
bias control.

I checked the HV (on the TS-520SEs meter) when transmitting CW and its ~
800V. I checked cathode resistors R2 and R3 (out of circuit) on the final
power amplifier board...

I am working on restoring/refurbishing a Johnson Viking Ranger. Due to a
split in the original, I would like to replace the Rubber Gasket (D6 in the
Assembly Manual) that is installed on the Escutcheon (D4) that the Dial
Plate for the VFO (D5) is mounted in. The D6 Gasket is basically a small
rubber U-Channel that measures 5 mm x 5 mm (outside dimensions) that slides
over the edge of a piece of sheet metal.